Automatic firearm



Jul 2 192 Y 6 7 G. NORMAN Y AUTOMATIC FIREARM QH N` 1 Afm/Mn Patented July 26, 1927. 19631234;

BRMI'GHAM SMLL' ARivrs ycoicfifiliixnr LrMrTED, Vor BM'INGHAM, yE1 IGJLAN13.

Y n' y y ATOMAT'IG FIARM Apiiiieaiioirmed Novmber 1-7, 1926i seria'l No. 148,954; and in" e'rerritain'i'ruiyfs', 1555i This inventiorrelates to. improvements: m breech: mechaimsm: Onthe rear end O'hee55 automatic :fireermsof the type hayingea' aforesaidisfety `lrieigmslua position-ineartoj fixergl`l u-1`-el and wherein' a` rotary and reelp*` the triggenen' operatingleyer andvispring rocatingbre'eeh bolt- 1s provided lWithloek-V devientaremounred;y Which-lever and detenti 5 ingla'butments adapted to engge Wiihlo'ck-v are arrangedzind;ddaptedi'to permit ofmovjeiy ingabutmenfs the'breech bodyor receiveig*` ment of the sziidfflever toits;operaiive:,0rii1r--V 60 and'sifre'eurn spring is interposed* beigween A operaftiverpositions-by means offihe shootefs the breech boli*J land-en' end cap mounted-on linger, While" the gun is held redyfforeiring.- the breech-body, Whi'hfsp-ringis' compressed` In' order th' the invention m'a'y be clear-,

U loyl the" recoil-ing finoyem'enb of the breech ly- 7undersiood and; readilyi ;crriedointo.'

bolt and energy is vthereby stored' ory Conf-'-effect;IWilldescribeiszimerWithfreference-to65 ser-'vedfin" the springi-and then utilizd'-to` the :accompanying illusrtive drziwingsg'in effect the closing of the. breech meclia'nisnml W-hifchj:%A f." m I A o L g The inyenion'reltes'moreparticularlytoa ,Figures l and 2 are, respectively; ai pero.

5 safetyfdeyice 'ii'i'ten'dedtolpreife'n't )rotaryorl sectional elevti0n,;andia' part sectional` plan unlocking'moi/"ementl or the breech bolt and viewioflanautomatio iire-armembodyingref 70 movement orreleasef of che trigger'me'ehe Y safety. deyiceconslructedfin-zrceordzmcey with' anism* when the bree'olr mechanism is-inits and" emlodyingv the features oftliis in'ven`` closedposfition sind@ etriggerme'chnism tion.`l j' f f f y 0 cooled rea-dy for firing, l and hts'l fory its Figure 'Bris arnsverse section taken on object` topro'yid'e' meansffor-eiecting the lin'e?3-3',-liligure'l-. ,1f 575 simulzueous lo'clingof thebre'ech' holt andA Figure 45: isiwitrinsverse section taken onv trigger mechanisim whichy is simple in'conf line-i 4-#43 Figure 1'; .Y y w 1 "structionfundfaidapfed to' be readily actute'd Figures; .5&5 5P mdvv 5c areyrespecii-ivelyf 5` by the foresiiigier of the hand which grips' asid'e elevation,` an endviW-r'and transverse;

the gun- Y y Sectionalv :views at A" and B (Figure 5^) of' 80 The inyenfiou contempltes anautomatic the safety rod?. l A Y o fire-arm of the type referred to, wherein a Figures" 6,6?- ztndvl are,I respectively,.-:aml

"safety device,V for preventing rotary orf un# end yiem a'sidielevatiion'und aipianview of lockingl movement of the' lore'ech holt' andv thesufety rod''operatingvarm'orilever. l y L movement or release` of triggermechanism,V Figures 7, 7el and 7b are, respectifyel'y,y m85 may be readily zicjuzi-'ced bythe shooters foreL rot'leileyatiom asectional side elevation/'andv finger when grippingl the gun 'in the posi-l aplnfnfyiew of theasee-r.y Y l 7 w; r Y i -z tion ready for 'firing which safety Vdevice Figur'ef'ris a` sid-e elevation ofthe rear endl 30 comprises a safety bar or spindle roem-ably* of the'breech boit v 1 v mountedl andlongitudinally disposed inv the fFlgu''Q is an' elevation' of the? rer endof 90 side of the breeohobodyfand,havingit projeCV- the breech loo'lt.' y f f: i tion ait its' front'endfandgdps-inits'sids; the" Acjeorcl'i'ngfto one'prafciical'embodimenof saidiprojectionsend glips'beiiig so'pa'ilnged thisinvention;asfillustred"in'the ajccoinl. an'd disposed thu aL periti/allg rotation of* the` puiy'ir'fgfd'rziyiiigs,V thesaf''y bar-i1 -is forme'd barA WillA bringV they projeetionT info engage? ofi:y round*brfiwlichf is rotatablyIii'ou'nfnedv 95 menuwitlr a' groovei-irihefperiphery ofoiie in in approximt-elyf `semi#cylindrical lonorili ofthe lockingabuimentson the' breech"bolt,` tudinaifgroove .QforiiiedA` 'in fone sideofi t 'e and: valsobriug ar'nurroiy'gapjin the said-br' inner fcelof the breechbody and? disposed;

intoeiiggement with. a. lug' orproje'ction on? ai; a position' ai'lo'out?forty"'ive degreesfbelovif the" seiar of the4 trigger m'echunisni,v whereby; theho'rfizontl, zin'd"extending:hroughfa sec-A w@ the-said partsare lockedend'moyemeni of tion of theVY inferrupteclscrew;fthreadsillin same isthusprevented YBly-:1,reversepartiielf` the' end of the ylot'idy'l infvwhichiismounted' rotation of the said safety bar, a'cub'w'y the'e'ii'dcp 5, the'lattervbeiiigfedpted; When;

part af; the end thereoran'd Vafxfvide gp/"in, in position@ to longitudinlly confine( the the side of the vlaminare` brought'respectively safety' ba'rl in' its opertiye positiondnithe" 105 opposite to the locking'rlugfon iheflool:`r andI b'rer'ecli'l body Thefbrechfboli 7 has o ,nyifts tlyieprojection onl thelsear; and perniijtof' p'erip'herye'plurgtliy'J of lockin'gzahuiments the'ringlof'thegunand the openingY of the' 6 which, Whenfsaid'bolt'is "partially rotated;

Q'. Y Y1,637,234V

engage a plurality of complementallocking end of the notch 11@ The notch in abutments 10 formed on the interior of ,the Ysubstantially longitudinal alignm nt withV breech body to lock the bolt 7 against longithe cut-away'portion 13,"so that, when the 1 tudinal movement. The firing', mechanism bar 1 is Vpartially.rotated to bring its cut v comprises a" firing pin whichY is Vurged foraway. portion 13 opposite tothe recess 9 of TU wardl by a spring'and is provided vwith a thelockmg bolt,`the notch'liv will bebrought bent or Vengagementby al nose ofthe Sear opposite' to thelug"or'fprojectionA 120i the S. The sear 8, which is of substantially bell-5` sear 7.8, thus permitting the vseal' 8v to be crank orm, is pivotally mounted onthe' rocked on its pivot by actuation of thetrig-I 1li-breech body in advance 'of thetrigger17,'l ver 17 to disengageV its gbent'lengaging nose 75 and has one arm which forms its bent-engag- VTroni the bent of the firing pin. e .Y ing noseprojectingupwardlythrougha slotv The operatingfa'rm or lever 15V ofV the i` in thebreech body to engage with the bentVY safety bar 1 lies in a *slot in thefsideY `of the Y on the firing :pin and has its other arm def breech bodyV 3 and in the fore endrstock 16 end of a link, of which the other end is 4, to ermit of it eing easily :manipulated f connected to or associated with the upper by av nger of 'th;e shooter.v Itcomprisesan endof the trigger 17 ivotallyconnectedibe-V `inner boss v18Vghavv1ng a hole through' whichY tween itsfupper and lbwerend's to the rear lthe Safety. bar 1 extends andwhas a' notch19f`V l5 pending below'its pivot Vand engaged by one ,adj acent Vtoethe tri ger 17,;infFigures 2V and 80` 201portion ofV the breech, body. "The sear 8 hasy -to receivea pin or pro]ection20 on the-said l85Y 25 entlyappear. f

anadditionalarmlor-lug12 which extends b ar whereby the arm v15 .is lixedvinroperaf lupwarll therefrom, ntdthebreech' body l,tlve' position on Ysind bah- '1`he121rrn-l5A is substan'ti'ally..v at a'right -anglefto its bent-en! curvedl and'its endislpreferablyknurled Vto gaging arm for a purposewhich will presyaeill'tate;the movement of same@- i Y i 'f s A transverseslotQlis formed V nfthefboss 9" Arportion of thefperi'hery of the bar 1k is. 18' aildthrOug'h part` of the length of the opcut :awayVV at: its orwar end,` as kat 13, thus l erati'ngrlever 15, thus-,producing a springy` forming a segmental portion andra, recess.g;l1mb V.or-membe'r 22 on, the" outer. face vof The breech 'bolt 7 f basa" substantially se'mi.-`v which' is vformed a pro'ection '23 adapted to f Y Y 30 'cylindrical groove 9 in its periphery atolv ylelflmgly 61gag--fw1t notches-fior Ajdetentsli Y l Y adjacent Sits rear end fandfso located '.relaie formedin one side of theslotin thebreech" tively to its lockingabutments''that, when body-3 1n which `th Said lever lis mounted, the bolt is partially rotated to move its lock- `and Vthus Serves to "hold the llever in eitherits ing `abutments 6 into engavemer'i'tA with the operative or inoperative position.v A

Y. r35' locking'. abutments `10Y of .tiefbreech-bodyf Having kfully deS'CIllbd Vmy invention,

saidegroove 9` will be opposite the longitudiwhat I desire to claim and secureby'Lettersk nalV grooveQ 'of `the breech bodyat .which Patent is time the bar lfmay be partiallyrotated V to 1. Ina irearmp'comprisingla breech causejits .segmental portion,V to entery said a vbreechfbolt insa'idbody having means 40 groove 9` and thus lockV thev breech bolt adapted, when said bolt is partiallyrotated 1075 against rotation., But when` the bar 1 is on its axis, tofengare complemental means f,

partially rotated in thel opposite direction in the breech bodyf or` locking said bolt in' A itssegmental portionis movedbut ofthe closedpositi'on anda firing pin longitudi recess 9 and its cut-away portion is brought nally movablein the breech body, aV swear forA i Y 4 5 opposite t'o said recess 9, at which timefthe holdingsaid firinggpin in cocked {position 110 Vbreech bolt may be partially rotated/to disand ,trigger :forjrele'asingA said sear, linea'ns' engage itslc inggabutmentsv 6 from the yfor simultaneously locking vthe breech bolt locking abutments 10 of thefbreech body. against rotation andthe searagainst'relea'se, Y

The bar 1l also has a notch 11 1n its pe-, said meanscomprising a rod extendinglongil 50 riphery so located relatively'lto thecutfaway tudinally of the. breech body'- andmountedflrlrV if portion y13 that, when the locking abutments torockata right angle to itslength, said 'i 6 of the breech bolt7 are iii-engagement with, rod v.having portions movable, respectively, i' Y the locking `abutments 1010i the Vreechfbody intoY and out of the path of rotar movement and the bar 1 is partially rotated to cause its of thev breech bolt and `in toan l outof the 55 segmental portion toenter the'groove 9 of path of movementof a artof the searwhenl the breech bolt, the verticallyl disposed lug -thelocking meansl of t ebrfeechV bolt are in' or projection 12 on the searS ofthe trigger engagement with Vthe Vlocking means of the i Y mechanism will-entersaid notch with its rear breech .body and saidjrod is, rocked in 'oppoedge bearing against thev rear end 'of said site directions,r andV means projecting'ex- 60 notch and thus lock the Vtrigger mechanismv teriorly of the breechl body Yadlacent the trigl '65 rear .end extendsreirwardly A of the rear the locking against actuation. The bar also has in` its ger Vfor rockingl said rod.

' l* peripheryy o an additional notch 14 which 2.. 'A firearm according to l wherein merges into the notch 11 'at-substantially a the portion ofthe rodwhich isfrmovable into right-angleto the latter and yof which .the and outbf the pathfof rotary movement bij vbolt lis substantially '*sentii-c'yl'rnr- .771750 Cil drical in cross-section and the breech bolt has on its periphery a substantially cylindrical recess into and out of which the sub stantially semiscylindrical portion of the rod is movable.

4. A iirearm according to claim l wherein the breech body has a slot in its wall adjacent the trigger and the means for rocking the roc comprises a lever extending through said slot.

5. A ii 6. A iirearm according to claim l wherein the breech body has a slot in its wall adjacent to the trigger and the means for rocking the rod comprisesa boss secured to the rod and mounted in said slot, and having meansrengageable with one of the walls of said slot for holding the rod in operative or inoperative position.

7. firearm according to claim l wherein wall parallel to the axis of rotation of the breech bolt and in which the rod is mounted tovrock. Y

8. A firearm according to claim l wherein the wall of the breech body has an internal longitudinal groove in which the rod is mounted to rock and a slot intersecting said groove at a right angle to the latter adjacent the triggei-,Vand the means for rocking the rod comprises a bossvengaging the rod and rotatable in said slot.

9. A firearm according to claim l wherein the breech body has a slot radially disposed relatively to the breech bolt and the means for rocking the rod comprises a radially slotted boss engaging the rod and having one when said boss is against release, A extending longitudinally of the breech body and mounted to rock at a right angle to its length, saji-d rod having means movable into out o j of notches arranged substantially lat a right angle to one one another, adapted, when of said notches said rod engagement with the locking bolt, and means adjacent the trigger for rocking said bar.

11. A firearm according to claim l0,

having' a radial slot forming a to move toward limb having a projection on its outer face and said wall having depressions to respectively receive the projection of said limb rotated to rock the -rod into operative and inoperative positions. i

VIn testimony whereof I have hereunto s et my hand. Y

GEORGE NORMAN. 

